topic in Intel® oneAPI Math Kernel Library

May be a bug about Data Fitting module...

Tianxiong_Lu — Mon, 07 Sep 2015 03:53:36 GMT

Hi all,

I got a problem while using data fitting module in MKL (I am using version 11.3.0 Build 20150730), here is the sample code.

#include <iostream>

#ifdef __cplusplus
extern "C" {
#endif

// sample function
int sample_dfslinearspline();

#ifdef __cplusplus
}
#endif

int main()
{
    std::cout << "hello!" << std::endl;
    return sample_dfslinearspline();
}

And the function sample_dfslinearspline is same with main function in MKL's example file %MKLROOT%\examples\datafittingc\source\dfslinearspline.c.

While run this code, I got a ERROR result :

Integration results for Y1 :

Integration interval Result

( -1.5, +0.5 ) -64372931560441346000000000000000000.000000

( -1.0, +1.0 ) +0.000000

( -0.5, +1.5 ) -67739524352558409000000000000000000.000000

Integration results for Y2 :

Integration interval Result

( -1.5, +0.5 ) +0.000000

( -1.0, +1.0 ) -67739524352558409000000000000000000.000000

( -0.5, +1.5 ) +0.000000

If I remove the first output line :

std::cout << "hello!" << std::endl;

Then the result is correct.

Next, I check the example code, and add a CheckErrorCode line after call dfsIntegrate1D, just like :

/***** Compute integrals *****/

    errcode = dfsIntegrate1D( task, DF_METHOD_PP, nlim, llim, llimhint,

                              rlim, rlimhint, ldatahint, rdatahint,

                              r, rhint );

    CheckDfError(errcode);

Now, it report an error after call dfsIntegrate1D:

Error: invalid flag defining structure of spline based integration results (code -1034).

Is it a bug? My project is generate from Qt Creator.

Eugeny_G_Intel — Mon, 07 Sep 2015 15:58:00 GMT

Hi Tianxiong,

I was not able to reproduce the issue on our side under Linux OS, so it makes sense to sync up on the build/run parameters.

I used this build/run line on Linux which uses 32 bit version of Intel® MKL

icc -openmp -parallel -static-intel -mkl -L/home/mymkl/__release_lnx/mkl/lib/ia32 main.cpp dfslinearspline.c -o main.exe

./main.exe

Can you specify the build line you use on your side? It could be found by using option -n when running qmake

Thanks,

Eugeny.

Hi Eugeny,

Tianxiong_Lu — Tue, 08 Sep 2015 03:29:29 GMT

Hi Eugeny,

Sorry, I can not found any option -n about qmake.

I build this program in QtCreator IDE or with VS 2012 compiler, just run nmake command without any options.

Now I found it runs correctly in command line, but failed with error code -1034 while run it in Qt Creator. So I think there are some differences on run enviroment variables. I will check it.

Thanks,

Tianxiong